DEVICE FOR AUTOMATIC CONTROL OF BREAK-DOWN VOLTAGE OF LIQUID DIELECTRIC Russian patent published in 2002 - IPC

FIELD: test of electric strength of insulation of liquid dielectric materials. SUBSTANCE: device for automatic control of break-down voltage of liquid dielectric has recorder of break-down signal, amplifier, control unit, counter of break-down number, indicator of break-down number, voltage adjustment unit, valve unit, storage, voltage indicator, register. Voltage adjustment voltage comprises generator, counter, digital-to-analog converter connected in series. Device realizes two operational conditions: MEASUREMENT and SCANNING. Condition MEASUREMENT includes two subconditions: CYCLE and AUTOMATIC. Subcondition CYCLE provides for series of measurements for one portion of dielectric. Subcondition AUTOMATIC secures uninterrupted repetition of series of measurements up to forced stop under action of operator. Condition SCANNING ensures turn by turn reading of measurement results kept in storage on digital indicators. Action of valves FILLING and DISCHARGE of hydraulic system ensures automatic execution of washing of measurement cell, its filling and change of tested material. EFFECT: provision for automatic recording and storage of measurement results and for exception of constant presence of operator. 3 dwg